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91 lines
2.8 KiB
91 lines
2.8 KiB
// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "codegen-inl.h"
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#include "jump-target-inl.h"
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#include "register-allocator-inl.h"
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namespace v8 {
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namespace internal {
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// -------------------------------------------------------------------------
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// JumpTarget implementation.
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void JumpTarget::Jump() {
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DoJump();
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}
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void JumpTarget::Branch(Condition cc, Hint hint) {
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DoBranch(cc, hint);
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}
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void JumpTarget::Bind() {
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DoBind();
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}
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// -------------------------------------------------------------------------
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// ShadowTarget implementation.
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ShadowTarget::ShadowTarget(BreakTarget* shadowed) {
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ASSERT(shadowed != NULL);
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other_target_ = shadowed;
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#ifdef DEBUG
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is_shadowing_ = true;
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#endif
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// While shadowing this shadow target saves the state of the original.
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shadowed->CopyTo(this);
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// The original's state is reset.
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shadowed->Unuse();
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ASSERT(cgen()->has_valid_frame());
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shadowed->set_expected_height(cgen()->frame()->height());
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}
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void ShadowTarget::StopShadowing() {
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ASSERT(is_shadowing_);
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// The states of this target, which was shadowed, and the original
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// target, which was shadowing, are swapped.
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BreakTarget temp;
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other_target_->CopyTo(&temp);
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CopyTo(other_target_);
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temp.CopyTo(this);
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temp.Unuse();
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#ifdef DEBUG
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is_shadowing_ = false;
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#endif
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}
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} } // namespace v8::internal
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